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scsp: improve bit definitions

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This commit is contained in:
Zack Buhman 2023-05-15 10:43:25 +00:00
parent d1b0e4568c
commit 0210ac9c23
1 changed files with 9 additions and 5 deletions
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14
scsp.h
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@ -45,6 +45,7 @@ typedef struct scsp_slot {
} scsp_slot; } scsp_slot;
static_assert((sizeof (struct scsp_slot)) == 0x20); static_assert((sizeof (struct scsp_slot)) == 0x20);
static_assert((offsetof (struct scsp_slot, MIXER)) == 0x14);
// Formal register names are poorly documented; these are as faithfully as // Formal register names are poorly documented; these are as faithfully as
// possible derived from "4.2 Sound Source Register" // possible derived from "4.2 Sound Source Register"
@ -136,10 +137,13 @@ static_assert((offsetof (struct scsp, reg)) == 0x100000);
enum slot_bits { enum slot_bits {
LOOP__KYONEX = ( 1 << 12), // (KX) execute KEY_ON LOOP__KYONEX = ( 1 << 12), // (KX) execute KEY_ON
LOOP__KYONB = ( 1 << 11), // (KB) record KEY_ON, KEY_OFF LOOP__KYONB = ( 1 << 11), // (KB) record KEY_ON, KEY_OFF
LOOP__SBCTL = ( 0b00 << 10), // source bit control LOOP__SBCTL = ( 0b00 << 9), // source bit control
LOOP__SSCTL = ( 0b00 << 8 ), // sound source control LOOP__SSCTL = ( 0b00 << 7 ), // sound source control
LOOP__LPCTL = ( 0b00 << 6 ), // loop control LOOP__LPCTL__OFF = ( 0b00 << 5 ), // loop control
LOOP__PCM8B = ( 1 << 5 ), // (8B) 8bit signed PCM LOOP__LPCTL__NORMAL = ( 0b01 << 5 ), // loop control
LOOP__LPCTL__REVERSE = ( 0b10 << 5 ), // loop control
LOOP__LPCTL__ALTERNATIVE = ( 0b11 << 5 ), // loop control
LOOP__PCM8B = ( 1 << 4 ), // (8B) 8bit signed PCM
LOOP__SA = (0b0000 << 0 ), // start address LOOP__SA = (0b0000 << 0 ), // start address
}; };
@ -178,7 +182,7 @@ enum lfo_bits {
enum mixer_bits { enum mixer_bits {
MIXER__ISEL = ( 0b0000 << 19), MIXER__ISEL = ( 0b0000 << 19),
MIXER__IMXL = ( 0b000 << 16), MIXER__IMXL = ( 0b000 << 16),
MIXER__DISDL = ( 0b000 << 13), #define MIXER__DISDL(n) (((n) & 0b111) << 13)
MIXER__DIPAN = (0b00000 << 8 ), MIXER__DIPAN = (0b00000 << 8 ),
MIXER__EFSDL = ( 0b000 << 5 ), MIXER__EFSDL = ( 0b000 << 5 ),
MIXER__EFPAN = (0b00000 << 0 ), MIXER__EFPAN = (0b00000 << 0 ),